﻿<head>
    <style>
        #a {
            width: 100%;
            height: 50px;
            border: 1px solid black;
            text-align: center;
        }

        #a3 {
            text-align: left;
            margin-top: 10px;
        }

        #a1 {
            width: 300px;
            height: 20px;
            border: 1px solid black;
            float: right;
            margin-top: 15px;
            margin-right: 5px;
        }

        #b2 {
            width: 500px;
            height: 1800px;
            margin: 0px auto;
            border: 1px solid black;
            margin-top: 10px;
        }

        #b3 {
            width: 450px;
            height: 100px;
            border: 1px solid black;
            margin: 24px;
        }
    </style>
</head>

<body>
    <div id="a">
        <div id="a1">
            登录
            <a href="我的主页.html">个人主页</a>
        </div>
        <div id="a3">
            <form action="gettiezi" method="post">
                <input type="text" name="xsn" value="" placeholder="请输入关键字" />
                <input type="submit" value="搜索" />
            </form>
        </div>
    </div>
    <h2></h2>
    <div id="b2">
        <div id="b3">楼主</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">楼</div>
        <div id="b3">发表新回复</div>
    </div>
</body>